Aged Titanium 4-4-2 vs. Aged Titanium 6-6-2
Both aged titanium 4-4-2 and aged titanium 6-6-2 are titanium alloys. Both are furnished in the aged (precipitation hardened) condition. They have a very high 96% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is aged titanium 4-4-2 and the bottom bar is aged titanium 6-6-2.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 120 |
| Elongation at Break, % | 10 | |
| 6.7 |
| Fatigue Strength, MPa | 620 | |
| 670 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Reduction in Area, % | 20 | |
| 17 |
| Shear Modulus, GPa | 42 | |
| 44 |
| Shear Strength, MPa | 750 | |
| 800 |
| Tensile Strength: Ultimate (UTS), MPa | 1250 | |
| 1370 |
| Tensile Strength: Yield (Proof), MPa | 1080 | |
| 1230 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 400 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 310 |
| Melting Completion (Liquidus), °C | 1610 | |
| 1610 |
| Melting Onset (Solidus), °C | 1560 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 540 | |
| 540 |
| Thermal Conductivity, W/m-K | 6.7 | |
| 5.5 |
| Thermal Expansion, µm/m-K | 8.6 | |
| 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 39 | |
| 40 |
| Density, g/cm3 | 4.7 | |
| 4.8 |
| Embodied Carbon, kg CO2/kg material | 30 | |
| 29 |
| Embodied Energy, MJ/kg | 480 | |
| 470 |
| Embodied Water, L/kg | 180 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 89 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 34 | |
| 34 |
| Strength to Weight: Axial, points | 74 | |
| 79 |
| Strength to Weight: Bending, points | 55 | |
| 57 |
| Thermal Diffusivity, mm2/s | 2.6 | |
| 2.1 |
| Thermal Shock Resistance, points | 93 | |
| 90 |
Alloy Composition
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| Aluminum (Al), % | 3.0 to 5.0 | |
| 5.0 to 6.0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Copper (Cu), % | 0 | |
| 0.35 to 1.0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.2 | |
| 0.35 to 1.0 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 5.0 to 6.0 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 to 0.040 |
| Oxygen (O), % | 0 to 0.25 | |
| 0 to 0.2 |
| Silicon (Si), % | 0.3 to 0.7 | |
| 0 |
| Tin (Sn), % | 1.5 to 2.5 | |
| 1.5 to 2.5 |
| Titanium (Ti), % | 85.8 to 92.2 | |
| 82.8 to 87.8 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.4 |